A study of platinum-supported catalysts through hyperfine interactions |
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| Authors: | H. Saitovitch P. R. J. Silva A. M. Rodriguez J. Weberszpil F. B. Passos M. Schmal |
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| Affiliation: | (1) Centro Brasileiro de Pesquisas Fisicas (CBPF/CNPq), Rua Dr. Xavier Sigaud 150, 22290-180 Rio de Janeiro, RJ, Brazil;(2) Dept. Eng. Química, Univ. Fed. Fluminense, Rua Passos da Patria 156, 24210 Niterói, RJ, Brazil;(3) COPPE/EQ, Univ. Fed. Rio de Janeiro, C.P. 68502, 21942 Rio de Janeiro, RJ, Brazil;(4) Present address: Laboratorio de Espectroscopia Nuclear y Interaciones Hiperfinas (LENIH), Dt. Física, UNLP, CC-67, 1900 La Plata, Argentina |
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| Abstract: | The effect of indium addition on alumina-supported platinum catalysts was investigated by measurements of hyperfine interactions. Via lime differential perturbed angular correlation spectroscopy (TDPAC) on111Cd, Pt/Al2O3 catalysts were studied in the flow of a heptane/H2 gas stream. The results indicate that some amount of indium sticks to platinum which is then dispersed on the support surface. The amount of In that is free from platinum is mobile under reaction conditions, being capable of diluting platinum particles and draining off coke precursors from the platinum surface.Researcher from  Consejo Nac. Invest. Cient. Tecn., CONICET , Argentina. |
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